A Harlem high school principal dismissed for urging parents to falsify their income on school lunch forms to get more federal poverty aid for his school will be reinstated to his post on Monday, city education officials said yesterday.

The principal, Maurice Collins, of A. Philip Randolph HS, last month advised parents in a letter to estimate their income “conservatively” on an accompanying lunch form, telling them that doing so would be “better for the school.”

He even encouraged them to omit information about any secondary jobs they may have and threatened to withhold MetroCards from their children if they did not return the forms.

Citing parent and student support for Collins, education officials said he would be fined $10,000 and that department lawyers would review his future correspondence with parents.